box b 3 3 3
profile p c 0.5 360
ttranslate p 1.5 1 0

featprism b p p 0 0 1 0 1
featperformval prism bb 5

profile pp x 0.5 y 0.5 x -0.5 y -0.5
trotate pp 0 0 0 1 0 0 90
trotate pp 0 0 0 0 0 1 90
ttranslate pp 1.5 1.5 1

featrevol bb pp pp 1.5 1.5 1 0 0 1 1 1
featperform revol result

set square 61.854